Hello Brett, It is so nice to try to help you with your concerns. Let us start with your Whey Protein Powder.Whey protein isolate is the best form to buy as it is 90% protein and has the least amount of lactose and fat. Whey protein tends to be quickly absorbed. Body builders need more protein than most as the .8 g/kg is not enough for them. And, it should be used just before and just after exercise for optimal physiological benefits. I recommend 1.2 - 1.7 g proteing/kg body weight from food and supplements combined.Vitamin D3 of 800 IU may be ok, but without a blood test I cannot say. The dose is in line with our Dietary Reference Intake Guides with 600 IU being the recommended amount for a male 19-30, B-Complex is a water soluble vitamin so I doubt if there will be a problem with taking too much. It does help with energy production, nervousness, but your coach is probably giving it to you to help with energy production. Vitamin E - Supplementation with 100 to 200mg of vitamin E daily can be recommended for all endurance athletes to prevent exercise-induced oxidative damage and to reap the full health benefits of exercise, was recently concluded from a study although, honestly, the whole area is being debated. Vitamin C at 1 gram per day is way above the recommended amounts, but if you want to read information to the contrary to the information you have received, please read the link below: Vitamin C and E supplements hinder endurance training: Study By Oliver Nieburg+, 04-Feb-2014,Athletes supplementing with vitamin C and E could be harming their endurance ability, a study by Norwegian researchers suggests. See: http://www.nutraingredients.com/Research/Vitamin-C-and-E-supplements-hinder-endurance-training-Study. I cannot support the use of the vitamin C.Aristozyme syrum contains enzymes to aide in the digestion of food. I have not a clue why you are on this. These are enzymes secreted from the pancreas to break down carbohydrate and fats, but most people make enough of their own. I hope I have answered your questions. Specifically, as far as side-effects, in summary, I would be somewhat concerned about the combination of the massive vitamin C dose along with the vitamin E and the negative effects some studies are showing in endurance athletes on their muscle composition when taking this combination. Please read the evidence. Thank you for this opportunity to help. Kathryn